Scale collection device for downflow reactors

Patent metadata

Field	Value
Publication number	US-11298669-B2
Application number	US-201816221197-A
Country	US
Kind code	B2
Filing date	Dec 14, 2018
Priority date	Dec 21, 2017
Publication date	Apr 12, 2022
Grant date	Apr 12, 2022

Abstract

The invention involves a scale collection device that is located within downflow reactor head for removing solids from feed streams to increase reactor operating cycle time without impact on effective reactor space for catalyst loading. More particularly, a filtering zone is located in an upper portion of a reactor vessel above a rough liquid distribution tray and a distribution tray.

First claim

The invention claimed is:

1. A reactor comprising an upper portion and a lower portion wherein the upper portion comprises:
a rough liquid distribution tray comprising a cylindrical side wall coupled to the rough liquid distribution tray, wherein the cylindrical side wall extends upward to a reactor top head;
a scale collection device comprising a filter defined by the cylindrical side wall and a grating, the grating supported by a plurality of spacers above the rough liquid distribution tray; and
a vapor-liquid distribution tray located below the rough liquid distribution tray.

2. The reactor of claim 1 , wherein the top of the cylindrical side wall contains holes or slots or cuts.

3. The reactor of claim 1 , wherein the lower portion contains a catalyst bed.

4. The reactor of claim 1 , wherein the lower portion contains a medium.

5. The reactor of claim 1 , wherein the lower portion contains a packing.

6. The reactor of claim 1 , wherein the filter comprises one layer of filtering material having the same physical and chemical properties.

7. The reactor of claim 1 , wherein the filter comprises multiple layers of filtering material having different physical and chemical properties.

8. The reactor of claim 1 , wherein the filter comprises porous ceramic pellets.

9. The reactor of claim 1 , wherein the spacers are coupled to the rough liquid distribution tray.

10. The reactor of claim 1 , wherein the filter comprises a plurality of liquid overflow chimneys.

11. The reactor of claim 10 , wherein the top of the overflow chimneys contains slots.

12. The reactor of claim 10 , wherein the top of the overflow chimneys contains cuts.

13. The reactor of claim 10 , wherein the top of the overflow chimneys contains holes.

14. The reactor of claim 10 , wherein there are caps on the overflow chimneys.

15. The reactor of claim 1 , wherein the rough liquid distribution tray contains holes sized to generate the desired liquid level on the rough liquid distribution tray.

16. The reactor of claim 1 wherein the cylindrical side wall comprises an outer edge of the rough liquid distribution tray.

17. An apparatus comprising an upper portion and a lower portion wherein the upper portion comprising:
a rough liquid distribution tray comprising a cylindrical side wall coupled to the rough liquid distribution tray, wherein the cylindrical side wall extends upward to a reactor top head, wherein a top part of the cylindrical side wall contains openings, and wherein the cylindrical side wall comprises an outer edge of the rough liquid distribution tray;
a scale collection device comprising a filter defined by the cylindrical side wall and a grating, the grating supported by a spacer above the rough liquid distribution tray; and
a vapor-liquid distribution tray located below the rough liquid distribution tray.

18. The apparatus of claim 17 , wherein the filter comprises a plurality of liquid overflow chimneys, and wherein the top of the liquid overflow chimneys contains slots, wherein the slots are V-shaped.

19. The apparatus of claim 17 , wherein the filter comprises a plurality of liquid overflow chimneys, and wherein the top of the liquid overflow chimneys contains cuts.

20. The apparatus of claim 17 , wherein the filter comprises a plurality of liquid overflow chimneys, and wherein the top of the overflow chimneys contain holes.

21. The apparatus of claim 17 , wherein the filter comprises a plurality of liquid overflow chimneys, and wherein there are caps on the overflow chimneys.

22. The apparatus of claim 17 , wherein the rough liquid distribution tray contains holes sized to generate the desired liquid level on the rough liquid distribution tray.

Assignees

• Uop Llc

Inventors

• Xu Zhanping
• Lesniak Steven J
• Bunting Jr Robert L

Classifications

• B01J8/0278

  Feeding reactive fluids (for solid material B01J8/0015) · CPC title

• B01J8/009

  Membranes, e.g. feeding or removing reactants or products to or from the catalyst bed through a membrane · CPC title

• B01J8/0242

  the fluid flow within the bed being predominantly vertical · CPC title

• B01J8/0085 Primary

  promoting uninterrupted fluid flow, e.g. by filtering out particles in front of the catalyst layer · CPC title

• B01J2208/00938

  Flow distribution elements · CPC title